Slasher Teams are just incredibly powerful. Most Slashers you come across have great stats, but unfortunately not a lot of utility.
Captains
Crocodile, Warlord of the Sea: 6/10 Crocodile is the only one who can compare to Mihawk for a Slasher captain. He helps you more with your health, but Mihawk still is the best captain.
Mihawk: 10/10 Mihawk has one of the best specials in the game and boosts the ATK of Slashers incredibly. He's just amazing.